2020 Fiscal Year Final Research Report
Understanding the mechanism of fruit size control with a focus on a persimmon small fruit mutant
| Project/Area Number |
19K15832
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 39030:Horticultural science-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2021-03-31
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| Keywords | 果樹 / ゲノム / 倍数体 / トランスクリプトーム / 果実発達 |
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| Outline of Final Research Achievements |
In this study, we analyzed fruit size, an important factor that determines the commercial value of fruits, from the aspects of genomics and fruit physiology of a small fruit mutant that arise from a nonaploid persimmon 'Hiratanenashi'. The small fruit mutant has no difference in cell size from the original, but have very fewer cells in fruit. Detailed examination of the transcriptome and developmental characteristics of ovary tissues before and after flowering indicated that the organ development speed may be related to fruit size. Combined with genomic data, we were able to infer the genomic characteristics of the main cultivar 'Hiratanenashi' and the mechanism and origin of the pleiotropic effect of small fruit mutations on fruit maturation.
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| Free Research Field |
果樹園芸学
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| Academic Significance and Societal Importance of the Research Achievements |
果樹における果実サイズは主要な育種対象の一つであり、これを自在に操ることは育種・栽培に関わる者の悲願である。本研究では、園芸学上重要な果実サイズ多様性の基盤となる分子メカニズムの一端を明らかにした。果樹作物において果実サイズの制御メカニズムが明らかにされた例は極めて限られており、本研究の成果は重要である。また、本研究では、小果変異を制御する有力な候補遺伝子や、エピジェネティック制御と思われる新たな果実サイズ変異体を見出しており、今後この解析を通して果実サイズの人為改変に向けた新たな知見が得られると期待できる。
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